package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<Dish>> list(Long categoryId) {
        //构造redis中的key 规则:dish_ + 分类id
        String key = "dish_" + categoryId;
        //1.查询redis中是否有菜品数据
        List<Dish> list = (List<Dish>) redisTemplate.opsForValue().get(key);
        //2.如果存在直接返回数据 无需查询数据库
        if (list != null && list.size() > 0) {
            return Result.success(list);
        }
        //3.如果不存在查询数据库 并且缓存数据
        log.info("根据分类id查询菜品:{}", categoryId);
        list = dishService.list(categoryId);
        //4.将查询到的菜品数据缓存到redis中
        redisTemplate.opsForValue().set(key, list);
        return Result.success(list);
    }

}
